The new SRAM S900 offers an option between the SRAM Rival OCT & the SRAM Force Crankset. The S900 utilizes a new unidirectional carbon crank arm with a forged alloy spider. This crank arm is also used with SRAM’s SRM™ & Quarq™ Power- Meter systems. The SRAM S900
Includes:: our proven Power- Glide™ chainrings & GXP™ BB system. It comes in full-size & compact ratios & in multiple crank arm lengths.